.route_tabbox{
    position:fixed;
    bottom:0;
    left:0;
    right:0;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    background-color:#f9f9f9;
    height:48px;
    padding-bottom: constant(safe-area-inset-bottom);//兼容 IOS<11.2
    padding-bottom: env(safe-area-inset-bottom);//兼容 IOS>11.2
    >span{
        flex:1;
        font-size:14px;
        line-height:48px;
    }
    .tabitem{
        a{
            color:#444;
        }
    }
    .selecttabitem{
        background-color:rebeccapurple;
        a{
            color:#fff;
        }
    }
}